Engineering and Technology Journal

A Comparative Study of Antibacterial Activity of ZnO and TiO2 Nanoparticles Against Gram-Positive and Gram-Negative Bacteria

Document Type : Research Paper

Author

Nanotechnology and Advanced Materials Research Center, University of Technology-Iraq, Alsina’a street, 10066 Baghdad, Iraq.

Abstract

Using the sol-gel technique, this study successfully synthesized two types of nanoparticles, ZnO and TiO2. The Fourier-transform infrared (FTIR) spectrum exhibited a broad peak, providing insights into crucial chemical bonds. The average grain sizes, 18.6 nm for ZnO and 12.6 nm for TiO2 were determined through X-ray diffraction (XRD). Scanning electron microscopy (SEM) images of the (ZnO & TiO2) powder revealed the presence of pores and agglomeration. The antimicrobial efficacy of these nanoparticles was evaluated against Gram-negative bacteria (E. coli and Proteus) and Gram-positive bacteria (Staph. aureus). The results demonstrated the capability of both ZnO and TiO2 to impact bacterial survival rates, with ZnO nanoparticles exhibiting a superior effect compared to TiO2 nanoparticles. This research contributes valuable insights into the antimicrobial properties of ZnO and TiO2 nanoparticles, emphasizing their potential applications in combating bacterial infections.

Graphical Abstract

Highlights

  • Two types of Nanoparticles, ZnO and TiO2, were prepared utilizing the sol-gel technique.
  • Nanoparticle characterization was studied using XRD, SEM, and FTIR.
  • Antibacterial activity of the Nanoparticles was compared against E.coli and Staph.aureus bacteria.
  • Results showed ZnO NPs affected the two bacteria more than TiO2

Keywords

Main Subjects

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Engineering and Technology Journal
Volume 41, Issue 10
Science
4 articles
October 2023
Page 1232-1240
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